This sample application shows how to compress and save a frame in standard JPEG with the codec. Exit !") ĪfxMessageBox("Problems Setting Quality. Hr = pMJPEGComp->QueryInterface(IID_IAMVideoCompression, (void **)&pV) ĪfxMessageBox("Problems querying IID_IAMVideoCompression. Query for the Video Compression Interface of the MJPEG compressor. The 'Capture' menu contains a 'MJPEG' section.ĭV2MJPEG is a transcoder from AVI DV format to AVI M-JPEG format. Each modification is marked by // # in the source code. It shows how to manage the DirectShow Decompressor via its private IIPM3JPEGdec interface (see CPlayerDoc::AddDecoderInFilterGraph in MFCDoc.cpp).ĭscap is a modified version of the video capture sample of DirectX 8 SDK.
#Morgan mjpeg decompressor full size
This sample play full size M-JPEG AVI files in CIF size (Height/2xWidth/2) using the fast Full2CIF internal mode of the codec. It uses VFW API and DirectDraw.Īn older version of codecBench, maybe easier to understand. It reads AVI files, decompress, display and compres. This file does not compile as-is but shows the AVIFile and VCM API structs and func to use and how to use it to compress, write to AVI, read from AVI and decompress in YUV.ĬodecBench is our home made test sofware for the codec. ICDecompress(hicd, n, lpSrcFmt, lpSrc, lpDecFmt, lpDec) ICDecompress(hicd, 2, lpSrcFmt, lpSrc, lpDecFmt, lpDec) ICDecompress(hicd, 1, lpSrcFmt, lpSrc, lpDecFmt, lpDec) ICDecompress(hicd, 0, lpSrcFmt, lpSrc, lpDecFmt, lpDec) ICDecompressBegin(hicd, lpSrcFmt, lpDecFmt) Hicd = ICOpen(ICTYPE_VIDEO, MJPG, ICMODE_DECOMPRESS) Here's a standard sequence of VCM API calls for decompression : You can find information on DirectShow SDK at : M3JPEGenc.ax (' Morgan MJPEG Compressor') M3JPEGdec.ax (' Morgan MJPEG Decompressor')
The codec comes with two DirectShow filters A video codec must conform to VCM to work with Video for Windows.)
VCM can also be considered a specification for an API. (Video Compression Manager : The Microsoft Video for Windows component that manages video codecs (compressor/decompressors). You can find information on VFW APIs at : M3JPEG32.dll is a Video For Windows codec (VFW codec) it can be managed through the Video Compression Manager (VCM). There's 2 APIs for programing with the codec :
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